期刊
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
卷 646, 期 15, 页码 1285-1291出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/zaac.202000222
关键词
Pre-activation; Li-rich cathode; Nanoscale defects; Citric acid; Voltage decay
资金
- National Key R&D Program of China [2018YFB0104300]
- Shenzhen Peacock Plan [KQTD 2016112915051055]
- Leading Innovation and Enterpreneur Team Introduction program of Zhejiang [2019R01006]
The application of Li-rich and Mn-based layered cathode materials is impeded by the discharge voltage decay and capacity fading upon cycling, despite their high specific capacity. Here, we combine pre-activation and nanoscale defects modification of lithium rich and manganese based layered materials to mitigate the above two serious problems through improved anionic redox activity and Li(+)conductivity. The optimum constructed nanoscale defects rich cathode material delivers a reduced voltage fading rate of 1.27 mV per cycle compared to 3.7 mV per cycle for the pristine material after 200 cycles at 1 C rate. Moreover, the nanoscale defects rich material delivers a high specific discharge capacity of 173.1 mAh center dot g(-1)with a high capacity retention of 99.5 % after 200 cycles at 1 C rate superior than the pristine material (89.3 mAh center dot g(-1)and 53.4 %, respectively). This study highlights the reversibility of oxygen redox in electrochemical stability and effectiveness of nanoscale defects in stabilize voltage.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据